21001001201110 has 256 divisors, whose sum is σ = 49722966374400. Its totient is φ = 6213253423104.

The previous prime is 21001001201099. The next prime is 21001001201113. The reversal of 21001001201110 is 1110210010012.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21001001201113) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 105873984 + ... + 106072156.

It is an arithmetic number, because the mean of its divisors is an integer number (194230337400).

Almost surely, 2^{21001001201110} is an apocalyptic number.

21001001201110 is an abundant number, since it is smaller than the sum of its proper divisors (28721965173290).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21001001201110 is a wasteful number, since it uses less digits than its factorization.

21001001201110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 198375.

The product of its (nonzero) digits is 4, while the sum is 10.

Adding to 21001001201110 its reverse (1110210010012), we get a palindrome (22111211211122).

The spelling of 21001001201110 in words is "twenty-one trillion, one billion, one million, two hundred one thousand, one hundred ten".